Improvement in attaching glass knobs to metal sockets



. J. W. HAIN-ES. Attaching Glass Knobs to Metal S00kets..

No. 196,447. Patented Oct. 23, 1877;

UNITED STATES PATENT OFFICE.

JOHN W. HAINES, OF CAMBRIDGE, MASSACHUSETTS.

IMPROVEMENT IN ATTACHING GLASS KNOBS T0 METAL SOCKETS.

Specification forming part of Letters Patent No. 196,447, dated October23, 1877; application filed July 12, 1877.

To all whom it may concern:

Be it known that I, JOHN W. HAINES,'of Cambridge, in the county ofMiddlesex and State of Massachusetts, have invented a new and usefulImprovement in Attaching Glass Door-Knobs to Metal Sockets, whichimprovement is fully set forth and described in the followingspecification and accompanying drawings.

This invention relates to the tube or gate which is introduced into theneck of the socket for the purpose of conducting the molten lead to theshank of the knob, thus casting the knob and socket together.

In the drawings, Figure 1 is a view, in perspective, of the tube orgate. Fig. 2 is aview of the said gate separated into its two parts,

with the gateway between, as it appears when broken on". Fig. 3 is alongitudinal section of a glass knob and metal socket constructedaccording to the description in Letters Patent granted to me July '3,1877 having the said gate inserted in the neck of the socket.

Similar letters of reference indicate correspondin g parts.

a in Fig. 3 represents a glass knob which is to be joined to the flangedmetal socket b. This is done by pouring molten lead through the guttersc and around the shank a of the knob a. The cork or stopple d is toprevent the lead from flowing into the inside of the knob.

In order to introduce the molten lead without making any opening in theflange of the socket I), thus marring its beauty, I pour it through thetube or gate 0, which is first placed within the neck of the socket, asseen in Fig. 3. This gate is made in two equal parts, as seen in Fig. 2,and has an inlet, f, which passes from the upper end, and opens near itslower end upon two opposite sides at g. The openings g are made upon thesplit or divided sides of the gatenot upon the whole sides.

The gate having been inserted in the neck of the socket, as in Fig. 3,the molten lead is poured in at the upper end of the inlet or gate f,and quickly passes down through the opposite openings 9 g into thegutters c, and thence around the shank a. The gate 0 is withdrawn andfalls apart and leaves the gateway h, which is broken ofi.

I am aware that there is nothing new in a gate or tube made in twoparts, and having a hole from top to bottom for conducting the lead downto the knob.

The peculiarity of my gate is the branching opening 9 g, for conductingthe lead by two opposite ways, said hole 9 9 being intersected by thedividing-line between the two parts of the gate. By means of thisinvention a gate or tube is produced which is particularly adapted foruse in connection with the invention patented July 3, 1877, abovealluded to. One of the two outlets g 9 may be omitted, if desired.

I am aware of the existence of Letters Pat ent numbered 134,931, grantedJanuary 14,-

187 3, for an improvement in molds for casting metal knobs, in which agateway or sprue c011- ducts the lead through the side of a knob to itsinterior, forthepurpose of rendering it more solid and substantial. Asmy gate is an internal one, and does not lead to the outside of the knob, (which must afterward be sealed up,) I do not claim anything shown insaid invention or Letters Patent.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

The sprue consisting of two parts, 0 e, and having gate f and one ormore openings, g, and stopper d, said parts arranged and constructed asand for the purpose set forth.

JOHN W. HAINES.

